Analog Electronics
The current gain of a pnp transistor is

 near zero.
 the ratio of collector current to emitter current.
 the negative of the npn current gain.
 the collector current divided by the emitter current.

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Analog Electronics
For transistor action

  Je must be forward biased and Jc should be reverse biased.
  the base region must be very thin and lightly doped.
  the emitter should be heavily doped.
  all of these.

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